<template>
    <div>
        <div id="slider" class="mui-slider">
            <div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
                <div class="mui-scroll"> 
                    <a :class="['mui-control-item', item.id === 0 ? 'mui-active' : '']" v-for="item in cates" :key="item.id" @click="getImg(item.id)">
                        {{item.title}}
                    </a>
                </div>
            </div>
        </div>

        <ul class="photo-list">
            <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/' + item.id" tag="li">
                <img v-lazy="item.img_url">
                <div class="info">
                    <h1 class="info-title">{{item.title}}</h1>
                    <div class="info-body">{{item.zhaiyao}}</div>
                </div>
            </router-link>
        </ul>
    </div>

</template>

<script type="text/javascript">
    import mui from '../../lib/mui/js/mui.min.js'

     export default{
        data() {
            return{
                cates: [],
                list: []
            }
        },
        mounted() {
            // 如果要操作元素了，最好在 mounted 里面，因为这时候的 DOM 是最新的
            // 等 DOM 元素加载完成之后，初始化滑动组件，
            mui('.mui-scroll-wrapper').scroll({
                deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
            });
        },
        created() {
            this.getTitle(),
            this.getImg(0)
        },
        methods: {
            getTitle() {
                this.$http.get('getTitle/title.php')
                .then( res => {
                    if(res.body.status === 0){
                        res.body.Message.unshift({ title: "全部", id: 0})
                        this.cates = res.body.Message
                    }
                })
            },
            getImg( cateId ) {
                this.$http.get('getImage/' + cateId +'.php')
                .then( res => {
                    if(res.body.status === 0){
                        this.list = res.body.Message
                        // console.log(res.body.Message)
                    }
                    // console.log(res.body)
                })
            }
        }
    }
</script>
<style lang="scss" scoped>
    *{
        touch-action: pan-y;
        /* touch-action 用于指定某个给定的区域是否允许用户操作，以及如何响应用户操作,（比如浏览器自带的划动、缩放等） */
    }

    .photo-list{
        list-style: none;
        margin: 0;
        padding: 10px;
        padding-bottom: 0;
        li{
            margin-bottom: 10px;
            background-color:#ccc;
            text-align:center;
            box-shadow: 0 0 9px #999;
            position: relative;
            img{
                width: 100%;
                vertical-align: middle;
            }
            img[lazy=loading] {
                width: 40px;
                height: 300px;
                margin: auto;
            }
            .info{
                position:absolute;
                bottom: 0px;
                background-color: rgba(0, 0, 0, 0.4);
                color:white;
                text-align: left;
                max-height: 84px;
                .info-title{
                    font-size: 14px;
                }
                .info-body{
                    font-size: 13px;
                }
            }
        }
    }
</style>